105 lines
2.1 KiB
C
105 lines
2.1 KiB
C
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/*
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* This software is licensed under the terms of the MIT-License
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* See COPYING for further information.
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* ---
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* Copyright (C) 2011, Lukas Weber <laochailan@web.de>
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*/
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#include "stageutils.h"
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#include <string.h>
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#include <stdlib.h>
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#include <GL/glew.h>
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#include "global.h"
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void init_stage3d(Stage3D *s) {
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memset(s, 0, sizeof(Stage3D));
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s->projangle = 45;
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}
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void add_model(Stage3D *s, ModelDrawRule draw, ModelPositionRule pos) {
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s->models = realloc(s->models, (++s->msize)*sizeof(Model));
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s->models[s->msize - 1].draw = draw;
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s->models[s->msize - 1].pos = pos;
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}
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void set_perspective(Stage3D *s, float near, float far) {
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glTranslatef(-(VIEWPORT_X+VIEWPORT_W/2.0)/SCREEN_W, -(VIEWPORT_Y+VIEWPORT_H/2.0)/SCREEN_H,0);
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gluPerspective(s->projangle, 1, near, far);
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glRotatef(s->crot[0], 1, 0, 0);
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glRotatef(s->crot[1], 0, 1, 0);
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glRotatef(s->crot[2], 0, 0, 1);
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glTranslatef(s->cx[0],s->cx[1],s->cx[2]);
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glMatrixMode(GL_MODELVIEW);
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}
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void draw_stage3d(Stage3D *s, float maxrange) {
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int i,j;
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for(i = 0; i < 3;i++)
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s->cx[i] += s->cv[i];
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for(i = 0; i < s->msize; i++) {
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Vector **list;
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list = s->models[i].pos(s->cx, maxrange);
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for(j = 0; list[j] != NULL; j++) {
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s->models[i].draw(*list[j]);
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free(list[j]);
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}
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free(list);
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}
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}
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void free_stage3d(Stage3D *s) {
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if(s->models != NULL)
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free(s->models);
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}
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Vector **linear3dpos(Vector q, float maxrange, Vector p, Vector r) {
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int i;
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float n = 0, z = 0;
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for(i = 0; i < 3; i++) {
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n += q[i]*r[i] - p[i]*r[i];
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z += r[i]*r[i];
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}
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float t = n/z;
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Vector **list = NULL;
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int size = 0;
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int mod = 1;
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int num = t;
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while(1) {
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Vector dif;
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for(i = 0; i < 3; i++)
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dif[i] = q[i] - p[i] - r[i]*num;
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if(length(dif) < maxrange) {
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list = realloc(list, (++size)*sizeof(Vector*));
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list[size-1] = malloc(sizeof(Vector));
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for(i = 0; i < 3; i++)
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(*list[size-1])[i] = - p[i] - r[i]*num;
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} else if(mod == 1) {
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mod = -1;
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num = t;
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} else {
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break;
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}
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num += mod;
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}
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list = realloc(list, (++size)*sizeof(Vector));
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list[size-1] = NULL;
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return list;
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}
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